97 lines
3.0 KiB
JavaScript
Executable File
97 lines
3.0 KiB
JavaScript
Executable File
'use strict';
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var identity = require('../../nodes/identity.js');
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var Pair = require('../../nodes/Pair.js');
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var YAMLMap = require('../../nodes/YAMLMap.js');
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class YAMLSet extends YAMLMap.YAMLMap {
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constructor(schema) {
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super(schema);
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this.tag = YAMLSet.tag;
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}
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add(key) {
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let pair;
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if (identity.isPair(key))
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pair = key;
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else if (key &&
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typeof key === 'object' &&
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'key' in key &&
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'value' in key &&
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key.value === null)
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pair = new Pair.Pair(key.key, null);
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else
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pair = new Pair.Pair(key, null);
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const prev = YAMLMap.findPair(this.items, pair.key);
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if (!prev)
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this.items.push(pair);
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}
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/**
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* If `keepPair` is `true`, returns the Pair matching `key`.
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* Otherwise, returns the value of that Pair's key.
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*/
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get(key, keepPair) {
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const pair = YAMLMap.findPair(this.items, key);
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return !keepPair && identity.isPair(pair)
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? identity.isScalar(pair.key)
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? pair.key.value
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: pair.key
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: pair;
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}
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set(key, value) {
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if (typeof value !== 'boolean')
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throw new Error(`Expected boolean value for set(key, value) in a YAML set, not ${typeof value}`);
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const prev = YAMLMap.findPair(this.items, key);
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if (prev && !value) {
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this.items.splice(this.items.indexOf(prev), 1);
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}
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else if (!prev && value) {
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this.items.push(new Pair.Pair(key));
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}
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}
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toJSON(_, ctx) {
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return super.toJSON(_, ctx, Set);
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}
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toString(ctx, onComment, onChompKeep) {
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if (!ctx)
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return JSON.stringify(this);
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if (this.hasAllNullValues(true))
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return super.toString(Object.assign({}, ctx, { allNullValues: true }), onComment, onChompKeep);
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else
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throw new Error('Set items must all have null values');
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}
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static from(schema, iterable, ctx) {
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const { replacer } = ctx;
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const set = new this(schema);
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if (iterable && Symbol.iterator in Object(iterable))
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for (let value of iterable) {
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if (typeof replacer === 'function')
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value = replacer.call(iterable, value, value);
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set.items.push(Pair.createPair(value, null, ctx));
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}
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return set;
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}
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}
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YAMLSet.tag = 'tag:yaml.org,2002:set';
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const set = {
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collection: 'map',
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identify: value => value instanceof Set,
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nodeClass: YAMLSet,
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default: false,
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tag: 'tag:yaml.org,2002:set',
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createNode: (schema, iterable, ctx) => YAMLSet.from(schema, iterable, ctx),
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resolve(map, onError) {
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if (identity.isMap(map)) {
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if (map.hasAllNullValues(true))
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return Object.assign(new YAMLSet(), map);
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else
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onError('Set items must all have null values');
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}
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else
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onError('Expected a mapping for this tag');
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return map;
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}
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};
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exports.YAMLSet = YAMLSet;
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exports.set = set;
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